What Supra diff do i need for my Sierra?
05-05-2015, 05:36 PM
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What Supra diff do i need for my Sierra?
Had one years ago but sold it.
Now need to buy another but cant remember which one i need.
Anyone help me out or even better still - anyone got one for sale?
05-05-2015, 05:45 PM
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I'm on the lookout for one too. Copied from another post but I believe 2WD needs a 3.727.
3.25 = 39/12 = MA70 Group A (Special race class)
3.727 = 41/11 = MA70 3.0 GT turbo
3.909 = 43/11 = GA70 M/T, most MA70
4.100 = 41/10 = JZA70 M/T and some A/T, some N/A MA70
4.300 = 43/10 = GA70 A/T, also some MA70
4.556 = 41/09 = GA70 GT
Philip.
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05-05-2015, 05:47 PM
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Im pretty sure my old one was 3.9 version but i sold it to Ade before i even got to use it
whats everyone else got as there are a few who use them on here
05-05-2015, 05:56 PM
cossie fan (unluckerly)
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Mines a 3.727 41 crown wheel teeth and 11 pinion teeth lsd type. It's the closest cosworth ratio one
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05-05-2015, 07:14 PM
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From what I've been reading online the '86 to '89 diffs are a true clutch type LSD and the '90 to '92 diffs are a 'torsen' type which are not meant to be as strong or lock up as well
Can anyone on here shed some light on this ?
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05-05-2015, 08:08 PM
cossie fan (unluckerly)
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I have to say I've a mate with a 550 ish bhp rwd saff with an elite sequential gearbox. Mostly used on track but a road car too. He fitted a supra diff the same as mine witch is the later type after breaking about 4 cosworth diffs. He drives his with 0 mechanical sympathy and it has been fault less. And it leaves 2 black lines lol
Last edited by ajamesc; 05-05-2015 at 08:09 PM .
06-05-2015, 08:44 AM
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Quote:
Originally Posted by
ajamesc
Mines a 3.727 41 crown wheel teeth and 11 pinion teeth lsd type. It's the closest cosworth ratio one
actually that is the one i used to have - gonna have to get another. I remember now as it was the closest to the cossie ratio.
06-05-2015, 08:44 AM
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So next question - who has one for sale?
06-05-2015, 11:20 AM
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Quote:
Originally Posted by
R4N SS
So next question - who has one for sale?
Hi what ratio do you want
Mark
06-05-2015, 01:05 PM
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Hi Mark,
Whatever is best for cossies - i work on computers - dont know about gear ratios
06-05-2015, 01:46 PM
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Quote:
Originally Posted by
R4N SS
Hi Mark,
Whatever is best for cossies - i work on computers - dont know about gear ratios
LOL
is it 2wd
do you want it to accelerate the same or a bit quicker
mark
06-05-2015, 02:09 PM
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Quote:
Originally Posted by
MK MOTORSPORT
LOL
is it 2wd
do you want it to accelerate the same or a bit quicker
mark
Very interested in this too
Mine is 2WD also...
06-05-2015, 03:38 PM
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2wd and want it to accelerate quicker but still want to hit some speed down the straights
although i doubt i will ever take it more than 150-160 anyway so acceleration is more important
06-05-2015, 03:53 PM
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Quote:
Originally Posted by
R4N SS
2wd and want it to accelerate quicker but still want to hit some speed down the straights
although i doubt i will ever take it more than 150-160 anyway so acceleration is more important
3.7 or 3.9 then
06-05-2015, 04:00 PM
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Quote:
Originally Posted by
MK MOTORSPORT
3.7 or 3.9 then
what the difference apart from .2 lol
06-05-2015, 05:27 PM
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Quote:
Originally Posted by
R4N SS
what the difference apart from .2 lol
ring 07990 630659
06-05-2015, 06:00 PM
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Mark, have you ever thought about making your 6 degree beams to take the supra diff without the need for the conversion kit?
06-05-2015, 08:21 PM
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Quote:
Originally Posted by
Caddyshack
Mark, have you ever thought about making your 6 degree beams to take the supra diff without the need for the conversion kit?
hi toby
i could do that but was never asked too ,but it wouldnt be any cheaper than kit
by the time jigs were made etc
mark
07-05-2015, 10:24 PM
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There will only be a tiny bit of difference between 3.7 and 3.9
Cheers Paul
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